EEVE: material preview displays nicely gloossy with default world, but fails with scene world (screen space breaks everything)
Your object looks different in material preview than in your final render because you have a highly reflective glossy surface and in material preview the preview HDRI is contributing things for the surface to reflect, but with just your scene lighting there's nothing to reflect.
The object is much darker with world lighting because the HDRI from material review is contributing more light to the scene than your lighting panel.
The comment pointing you to the other question was meant to point out that if you used an HDRI in your world, you would not have this problem.  Here are some examples.
material preview:

Mine looks different than yours because I have a different HDRI in material preview.
world space, low lighting, no HDRI:

world space, high light, no HDRI:

world space, different HDRI:

In the last I selected film-&gt;transparent in render properties.
Without transparency:

Lighting matters a great deal in what a material looks like when it is rendered.
You add an HDRI to your world lighting by going to the node editor, selecting &quot;World&quot; rather than &quot;object&quot;; selecting &quot;Use Nodes&quot;; and then adding something like this:

Then open up an HDRI in the orange box and that applies that HDRI to your world lighting.